Patents by Inventor Santosh Kumar Chanda

Santosh Kumar Chanda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the upgradation of petroleum residue
    Patent number: 6540904
    Abstract: The present invention provides a process for the upgradation of petroleum residue into useful fractions by subjecting petroleum residue in the presence of a solvent and ferrous sulphate catalyst to a pressure in the range of 10 atm. to 120 atm., temperature in the range of 380-420° C., for a period in the range of 0-120 minutes, in a reactor vessel, in an inert atmosphere. The charge is then cooled to room temperature and the product gas released through scrubbers. The residue is re-heated, if required, for free flow of liquid product. The resulting liquid product is distilled to obtain useful fractions.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: April 1, 2003
    Inventors: Suhas Ranjan Gun, Priya Bandhu Chowdhury, Kashi Nath Bhattacharya, Achinta Kumar Roy, Umanand Sharma, Swapan Kumar Ghosh, Awadhesh Kumar Sinha, Santosh Kumar Chanda, Sukumar Mandal, Sanjay Kumar Ray, Asit Kumar Das, Satish Makhija, Sobhan Ghosh, Akhilesh Kumar Bhatnagar